It is already against federal law to buy guns in one state and resell them in another without going thru a licensed dealer. It’s also against the law to smuggle them accross the mexican border.
Regarding a new AWB, we have something new we didn’t have in ‘94 when the 1st AWB was created by the feds......... SCOTUS ruled the 2A RKBA applied to us individuals. A new AWB may not pass heller muster.
Almost all the stuff Obama is doing doesn't pass Constitutional muster, what's one more? Besides, Kennedy would likely switch sides on any Assault Weapon ban case. "Reasonable regulation" don't you know?